VISCOUS COUPLING

专利名称：VISCOUS COUPLING发明人：CLANCEY S,US申请号：US30537672申请日：19721110公开号：US3809197A公开日：19740507

摘要：A coupling for driving a cooling fan device associated with a vehicle may belocated so that ram air impinges directly thereon. The coupling comprises relativelyrotatable input and output coupling members. The output coupling member defines achamber within which said input coupling member rotates. The input and output couplingmembers have a plurality of interdigitated lands and grooves which define a shear spacetherebetween and which are cooperable with viscous shear fluid in the shear space totransmit torque therebetween. A reservoir chamber 15 defined by said output memberand means for directing viscous fluid from said shear space into said reservoir chamber isprovided. Temperature-responsive valve means controls flow of viscous fluid from thereservoir chamber into the shear space and includes a temperature-sensing devicelocated forwardly on said output member in the ram air stream. All of the lands andgrooves on the output member are located on a forward position thereof which isdirectly in said ram air stream and all of the cooperating lands and grooves on the inputmember are located on a forward portion thereof to thereby provide effective heatdissipation due to their location relative to the ram air stream. Means is provided fordirecting viscous fluid flow radially of the input and output members to distribute viscousfluid to the outer peripheral lands and grooves including two radially extending

rectangular-shaped channels in the output member, and which are located diametricallyopposite each other. The means for directing viscous fluid radially further includes threeradially extending V-shaped channels in the input member and intersecting the lands andgrooves thereon. The V-shaped channels and the rectangular-shaped channels arelocated such that on relative rotation of the input and output members, they periodicallyaxially align to provide a large fluid flow area for directing viscous fluid radially thereof.

申请人：EATON CORP,US

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